Bell

Abstract

A bell having a mantle which is fully broken through by a plurality of gaps longitudinally and axially formed along the circumference of the mantle and dimensioned to tune the bell to a predetermined tonal frequency range.

What we claim is: 
     
       1. Bell made of aluminium or aluminium alloy, comprising a mantle, fully broken-through gaps (4) formed in the mantle for tuning said bell to at least a predetermined frequency range of tone, said gaps being formed along the periphery of said mantle and being separated from one another by spaces, said gaps running essentially parallel with the longitudinal axis of the bell mantle and following the shape of the bell mantle, wherein the centerlines of the gaps (4) lie in planes containing the longitudinal axis of the bell and when viewed from any point of said planes the gaps show a straight or arcuate pattern, wherein the width of the gaps and the space between two adjacent gaps are of different magnitude and, wherein the gaps are of different length. 
     
     
       2. Bell made of aluminium or aluminium alloy, comprising a mantle, full broken-through gaps (4) formed in the mantle for tuning said bell to at least a predetermined frequency range of tone, said gaps being formed along the periphery of said mantle and being separated from one another by spaces, said gaps running essentially parallel with the longitudinal axis of the bell mantle and following the shape of the bell mantle, wherein the centerlines of the gaps (4) lie in planes containing the longitudinal axis of the bell and when viewed from any point of said planes the gaps show a straight or arcuate pattern, wherein the spaces between two adjacent gaps are of different magnitude and, wherein the gaps are of different length.